Elliptical piston for a rotary steerable tool



FIG. 1 is an upper perspective view showing the elliptical piston ofApplicant's new design.

FIG. 2 is a first lower perspective view of the elliptical piston ofFIG. 1 .

FIG. 3 is a second lower perspective view of the elliptical piston ofFIG. 1 .

FIG. 4 is a front elevation view of the elliptical piston of FIG. 1 ,the rear elevation view being an identical mirror image thereto.

FIG. 5 is a left side elevation view of the elliptical piston of FIG. 1, the right side elevation view being an identical mirror image thereto.

FIG. 6 is a top plan view of the elliptical piston of FIG. 1 .

FIG. 7 is a bottom plan view of the elliptical piston of FIG. 1 ; and,

FIG. 8 is an upper perspective view of the elliptical piston of FIG. 1 ,in combination with a rotary steerable tool for context, shown in brokenlines, the rotary steerable tool forming no part of the claimed design.

The broken lines in the drawings illustrate portions of the ellipticalpiston which form no part of the claimed design.

CLAIM What is claimed is the ornamental design for an elliptical pistonfor a rotary steerable tool, as shown and described.